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12.6 Adding and Subtracting Radical Expressions

CORD MathMrs. Spitz

Spring 2007

Announcements• No School on Friday due to Parent/Teacher

conferences. This an opportunity for your parents to get a get out of 1 homework assignment free for you.

• I will check 14.10 assignment, Chapter 14 Review, Binder for all of Chapter 14 notes, and 12.5. These are new assignments for the 4th quarter.

• If you missed last Friday, you must be excused to take the make-up exam which will be administered Tuesday during Study Hall and lunch and Wednesday during Lunch. I need to return exams to all students Thursday.

• If you are planning on missing class on Thursday; keep in mind that you have a quiz scheduled for that date. You may NOT make up quizzes.

Reminders:

• Attendance—especially seniors. You fail at 11 absences. This is the Taos Municipal School District policy. You must have a 90% attendance rate in order to get credit for a class. (Especially SENIORS)

• Tuesday/Wed – 12.6• Wed/Thurs.-12.7 and Quiz

Objective

• Simplify radical expressions involving addition and subtraction.

Assignment• pp. 499-500 #5 – 39 all

Ex. 1: 112116113

112116113

11)263(

117

Ex. 2:

21714

24237579

2)43(7)59(

2714

75232479

75232479

Ex. 3: Find the exact measure of the perimeter of the rectangle.

233

43864 P

4363264 P

)233(2)362(2 P

wlP 22 362

IMPORTANT

• If each radical in a radical expression is not in simplest form, simplify them first.

• Then use the distributive property, whenever possible, to further simplify the expression.

Ex. 4:

752325987 325221652497

352245277

310269 310220249

752325987

Ex. 5: Simplify, then use a calculator to verify your answer.

28273 74273

72273

7473

71

65.2;7

485273 3165393

345333

Ex. 6: Simplify, then use a calculator to verify your answer.

32039 23.50;329

Don’t Forget

• Quiz Wed/Thurday.• Parent Teacher conference – get

a free homework pass.